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Chemistry · 2022 · 2 marks
CBSE 2022 · Region 1 · Set 3 · Q2
In the plot of molar conductivity ( Λ_m ) Vs. square root of concentration (√ C ), following curves are obtained for two electrolytes X and Y: Answer…
In the plot of molar conductivity $\displaystyle \left(\mathbf{\Lambda}_{\mathrm{m}}\right)$ Vs. square root of concentration $\displaystyle (\sqrt{\mathrm{C}})$, following curves are obtained for two electrolytes X and Y :
Answer the following :
(i)
Predict the nature of electrolyte X and Y.
(ii)
What happens on extrapolation of $\displaystyle \mathbf{\Lambda}_{\mathrm{m}}$ to concentration approaching zero for electrolytes X and Y ?
Marking-scheme solution
(i) \(\displaystyle X=\) Strong electrolyte, \(\displaystyle Y=\) Weak electrolyte
(ii) Curve \(\displaystyle X\) intercepts at \(\displaystyle Y\)-axis to obtain \(\displaystyle \mathbf{\Lambda}_{\mathrm{m}}^{\circ}\) whereas curve \(\displaystyle Y\) runs parallel to \(\displaystyle Y\)-axis and no \(\displaystyle \mathbf{\Lambda}_{\mathrm{m}}^{0}\) is obtained.
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CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.